Earthquake Magnitude Scale Magnitude Earthquake Effects Estimated Number Each Year 2.5 or less Usually not felt, but can be recorded by seismograph. Millions 2.5 to 5.4 Often felt, but only causes ...

How do you measure the size of a volcanic eruption? Just as seismologists measure the size of an earthquake using the Richter scale, volcanologists use an eruption magnitude scale called the ...

However, the true scale of the disaster remains unclear due to Myanmar’s ongoing civil war and a communication blackout, which have made it difficult for the outside world to fully grasp the impact.

I Felt by very few people; barely noticeable. II Felt by a few people, especially on upper floors. III Noticeable indoors, especially on upper floors, but may not be recognized as an earthquake. IV ...

A huge earthquake has struck the popular holiday destination the Fiji Islands today - measuring a massive 6.5 on the Richter scale at a depth of 174 kilometres (108 miles) ...